Support export component as ExtendedVue type in SFC

[Fnxxxxo]

What problem does this feature solve?

I use the type parameter of ExtendedVue to complete compile-time validation of props. Currently, the SFC export component as VueConstructor type which does not support it and result in:

TS2322: Type 'VueConstructor<Vue>' is not assignable to type 'RenderDefType<unknown, unknown, unknown, DecoderPropsType>'.
  Type 'VueConstructor<Vue>' is not assignable to type 'ExtendedVue<Vue, unknown, unknown, unknown, DecoderPropsType>'.
    Type 'Vue' is not assignable to type 'DecoderPropsType & Vue'.
      Property 'data' is missing in type 'Vue' but required in type 'DecoderPropsType'. 

What does the proposed API look like?

I am using Vue.extend in SFC which holds all type information.

<script lang="ts">
  import Vue, { PropOptions } from 'vue'

  export default Vue.extend({
    name: 'unknown-decoder',
    props: {
      data: {} as PropOptions<any>
    }
  })
</script>

Just merge the type with Vue?